Change department name to lower case : Update « Insert Update Delete « Oracle PL/SQL Tutorial

SQL>
SQL> CREATE TABLE DEPT(
  2      DEPTNO NUMBER(2),
  3      DNAME VARCHAR2(14),
  4      LOC VARCHAR2(13)
  5  );

Table created.

SQL>
SQL> INSERT INTO DEPT VALUES (10, 'ACCOUNTING', 'NEW YORK');

1 row created.

SQL> INSERT INTO DEPT VALUES (20, 'RESEARCH', 'DALLAS');

1 row created.

SQL> INSERT INTO DEPT VALUES (30, 'SALES', 'CHICAGO');

1 row created.

SQL> INSERT INTO DEPT VALUES (40, 'OPERATIONS', 'BOSTON');

1 row created.

SQL>
SQL>
SQL>
SQL> update dept
  2     set dname = lower(dname)
  3   where deptno = 10;

1 row updated.

SQL>
SQL>
SQL>
SQL> drop table dept;

Table dropped.

4.3.Update
	4.3.1.	Modifying Rows Using the UPDATE Statement
	4.3.2.	Change more than one column value in update statement
	4.3.3.	If the WHERE clause were omitted, all the rows would be updated.
	4.3.4.	Change multiple rows and multiple columns in the same UPDATE statement
	4.3.5.	Use function in set clause
	4.3.6.	Writing an UPDATE Statement Containing a Subquery
	4.3.7.	Use TO_DATE('December 31, 2005, 11:30 P.M.','Month dd, YYYY, HH:MI P.M.') in update statement
	4.3.8.	Set clause with math expression
	4.3.9.	Update with subquery
	4.3.10.	Update a subquery
	4.3.11.	Set value based on a select statement
	4.3.12.	Change department name to lower case
	4.3.13.	Update data from existing column
	4.3.14.	Update four columns
	4.3.15.	Update one row
	4.3.16.	Update salary based on average salary
	4.3.17.	Update the emp table, converting emp names to uppercase
	4.3.18.	subquery in update statement
	4.3.19.	To update the salary of all emps to the maximum salary in the corresponding department (correlated subquery):